Test output does not provide enough context

[svan-jansson]

There is currently no additional test output for the scenarios, they just look like default ExUnit tests.

Example of improved test output:

Feature: This is a feature

Successful Scenarios:
  
  Scenario: This is a scenario
    Given Some precondition
    When Doing something
    Then Something should happen
    And Something else should happen

  Scenario: This is another scenario
    Given Some precondition
    When Doing something
    Then Something should happen
    And Something else should happen

Failing Scenarios:

  Scenario: This is yet another scenario
    Given Some precondition
    When Doing something
    Then Something should happen
    And Something else should happen